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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="./js/2.js"></script>
  </head>
  <body>
    <div id="box">1234</div>
    <ul>
      <li>1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>
    </ul>
    <script>
      var div = $('#box')
      console.log(div)

      var lis = $$('ul > li')
      console.log(lis)
    </script>
  </body>
</html>
